20-9h=-7h-20

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Solution for 20-9h=-7h-20 equation: 



20-9h=-7h-20

We move all terms to the left:

20-9h-(-7h-20)=0

We get rid of parentheses

-9h+7h+20+20=0

We add all the numbers together, and all the variables

-2h+40=0

We move all terms containing h to the left, all other terms to the right

-2h=-40

h=-40/-2

h=+20

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